Telegraph-relay



(NoModeL) S. E. RUSK.

TELEGRAPH RELAY.

No. 245,223. Patented Aug. 2,1881.

WITNESSES: J E INVENTOR:

i mi ATTORNEYS.

UNITED' STATES PATENT OFFICE...

SAMUEL E. RUSK, OF OROTON-ON-THE-HUDSON, NEW YORK.

TELEGRAPH-RELAY.

SPECIFICATION forming part of Letters Patent No. 245,223, dated August 2, 1881.

(No model.)

To all whom it may concern Be it known that I, SAMUEL E. ItUsK, of Oroton-onthe-Hudson, in the county of Vestehester and State of New York, have invented anew and Improved Telegraph-Relay, of which the following is a lull, clear, and exact description.

Figure l is a plan view. Fig. 2 is a side elevation. Fig. 3is atransverse section taken on line a; 00 in Fig. .1. Fig. 4c is a diagram showing the arrangement of the local circuit.

Similar letters of reference indicate corresponding parts.

My invention relates to a novel telegraphrelay and main-line sounder; and it consists, essentially, of a permanent magnet having a movable poleextension surrounded by a helix, the pole-extension projecting between the poles of a second permanent magnet and carryin g the movable contact of the local circuit.

The invention also consists in a local circuit, including a certain amount of resistance additional to that of the sounder-magnets,

which is either short-eircuited or put wholly in the local circuit by the action of the relay.

A permanent magnet, A, of U form, is attached to the base B by one of its extremities, and has attached to or formed upon the other extremity a vertical yoke, O, in which is pivoted the upper end of the shaft D on a screw, E. The lower end of the shaft D enters a conical hole in the lower arm of the magnet A.

On the upper end of the shaft D a soft-iron poleextension, F, is mounted, and its enlarged end G is supported in close proximity to the pole of the magnet A and the yoke C, but touching neither of them. The pole-extension F is surrounded by a helix, H, of fine wire, whose terminals are connected with binding-posts a a, which receive the wires of the main line. The free end of the pole-extension F projects between the poles of the curved permanent U-magnet I, and is provided with an arm, I), which extends between the conducting contact-point c and the insulated contact (Z, and is provided with a platinum contact-sun face to insure a goodeleetrical connection between it and the conducting contact-point c. The points 0 d are arranged opposite each other in the arms of a bifurcated block, K, mounted on a rod, 6, and screw 11, extending across the yoke M, the latter being attached to the magnet I. The block K is movable on the rod 6, and may be adjusted by turning the screw L so as to bring the free end of the poleextension F into closer proximity to one or the other of the poles of the magnet I. The block K may be locked in any desired position. by the screw T.

The portion of the local circuit beyond the binding-posts N 1 includes a battery and a sounder. From the binding-post N, when the arm I) is not in contact with the point e, the local circuit is through a resistance, 0, concealed in the base, and the binding-post 1, making the circuit complete. Then the arm 1) contacts with the point 0 the local circuit is from the hindingpost N, through the magnet A, pole extension F, arm I), contactpoint 0, yoke M, magnet I, and binding-post l leaving the circuit complete as before, but the resistance O cutout. A movable soft-iron armature, Q, is pivoted to the lower arm of the magnet A, and is used to diminish the power of the magnet by connecting the two poles.

The principle of my invention is illustrated in Fig. 4, H being the helix which is in the main line, F the pole-extension, b the arm extending between the contacts 0 61,0 the resistance, It the sounder, and S the local battery. The local circuit is never broken. The resistance 0, when in circuit, prevents the local battery from operating the sounder but the contact of the arm I) with the point 0 cuts out the resistance 0 and throws the full power of the local battery on the sounder R. The upper pole of the magnet A being north, as indicated by n, the pole-extension F will also have the same polarity, and will be attracted by the south pole s of the magnet I; but when the main-line current passes in a proper direction through the helix II the polarity of the poleextension F is reversed, and the pole-extension is repelled by the pole s and attracted by the pole at, bringing the arm 1) into contact with the point 0, thus cutting out the resistance 0 and permitting the full energy of the battery to act upon the magnet of the local sounder.

It is obvious that when the main -line cur rent is sufliiciently strong the relay may answer the purpose of a main-line sounder.

Instead of the pole-extension F, I may em ploy a polarized armature or a soft-iron magnet-core with results similar to those already described. I may also place the helix H in a fixed position and make the pole-extension of such size as to be capable of' vibrating within it.

The instrument is adjusted to the circuit of the main line by moving the contacts 0 d by means ofthe screw L,by weakening or strengthening the magnet A, by moving the armature Q up or down, by moving the magnet I, or by varying the distance between the poles.

I am aware that the sounder has been placed in a branch of the local circuit, where it cannot receive the whole benefit of the local circuit but What I claim iscomplete local circuit, as shown and described. 2 5

SAMUEL E. RUSK.

Witnesses A. F. GHAsE, FRANK S. ROBERTS. 

